Heavier loads require the use of interface devices such as solid state relays

Features an integral triac

The diaphragm functions as both sensor and seal

Dynamic applications, the diaphragm provides an adequate seal

Static applications, a secondary internal gasket will ensure a near bubble tight seal

by
Copaair M

03/15/2016

This seems to fit the bill for a homebuilt Velocity retract system were building. The unit appears to actuate around 50kts and has male tab terminals which make for easy wiring. The four holes make mounting a snap.

In reference to the Spec Sheet (PDF), what is the set point range for your PN 11-13476 MPL503DO Air Pressure Switch Normally Open Setting?
Reference: http://www.aircraftspruce.com/catalog/pdf/11-13746.pdf
Per the vendor it is set to .5" to 3" in water.